...

diff --git a/MagickCore/compare.c b/MagickCore/compare.c
index 4d6979c4edc7974f43975d4aa8719aa7d026b546..1c4ebf83f2b9db444f23f11462d78a77ee4cfff8 100644 (file)
--- a/MagickCore/compare.c
+++ b/MagickCore/compare.c
@@ -916,7 +916,7 @@ static MagickBooleanType GetNormalizedCrossCorrelationDistortion(
     distortion[i]=0.0;
   rows=MagickMax(image->rows,reconstruct_image->rows);
   columns=MagickMax(image->columns,reconstruct_image->columns);
-  area=1.0/((double) columns*rows-1);
+  area=1.0/((double) columns*rows);
   image_view=AcquireVirtualCacheView(image,exception);
   reconstruct_view=AcquireVirtualCacheView(reconstruct_image,exception);
   for (y=0; y < (ssize_t) rows; y++)